ArticlePlant physiology2008
Water transport by aquaporins in the extant plant Physcomitrella patens.
Article in Plant physiology, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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Who cites it
13 citing papers in PubMed, 33 citations in OpenAlex.
- Evidence for regulation of transpiration in nonstomatal plants: insights from bryophyte gametophytes.The New phytologist · 2026Article
- Cytorrhysis under drought, osmotic and freezing stress.Protoplasma · 2026Review
- A conserved module in the formation of moss midribs and seed plant axillary meristems.Science advances · 2022Article
- Integration of mRNA and miRNA Analysis Reveals the Molecular Mechanism Underlying Salt and Alkali Stress Tolerance in Tobacco.International journal of molecular sciences · 2019Article
- Variation in Aquaporin and Physiological Responses AmongPlants (Basel, Switzerland) · 2019Article
- Heterotetramerization of Plant PIP1 and PIP2 Aquaporins Is an Evolutionary Ancient Feature to Guide PIP1 Plasma Membrane Localization and Function.Frontiers in plant science · 2018Article
- The Roles of Aquaporins in Plant Stress Responses.Journal of developmental biology · 2016Review
- Overexpression of a Barley Aquaporin Gene,Frontiers in plant science · 2016Article
- Specific pools of endogenous peptides are present in gametophore, protonema, and protoplast cells of the moss Physcomitrella patens.BMC plant biology · 2015Article
- Article
- Moss cell walls: structure and biosynthesis.Frontiers in plant science · 2012Article
- Freezing cytorrhysis and critical temperature thresholds for photosystem II in the peat moss Sphagnum capillifolium.Protoplasma · 2010Article
- Unexpected complexity of the aquaporin gene family in the moss Physcomitrella patens.BMC plant biology · 2008Article
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Authors and funding
8 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Although aquaporins (AQPs) have been shown to increase membrane water permeability in many cell types, the physiological role of this increase was not always obvious. In this report, we provide evidence that in the leafy stage of development (gametophore) of the moss Physcomitrella patens, AQPs help to replenish more rapidly the cell water that is lost by transpiration, at least if some water is in the direct vicinity of the moss plant. Three AQP genes were cloned in P. patens: PIP2;1, PIP2;2, and PIP2;3. The water permeability of the membrane was measured in protoplasts from leaves and protonema. A significant decrease was measured in protoplasts from leaves and protonema of PIP2;1 or PIP2;2 knockouts but not the PIP2;3 knockout. No phenotype was observed when knockout plants were grown in closed petri dishes with ample water supply. Gametophores isolated from the wild type and the pip2;3 mutant were not sensitive to moderate water stress, but pip2;1 or pip2;2 gametophores expressed a water stress phenotype. The knockout mutant leaves were more bent and twisted, apparently suffering from an important loss of cellular water. We propose a model to explain how the AQPs PIP2;1 and PIP2;2 delay leaf dessication in a drying atmosphere. We suggest that in ancestral land plants, some 400 million years ago, APQs were already used to facilitate the absorption of water.
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